<!doctype html>
<meta charset=utf-8>
<title>Node.appendChild: inserting text and script nodes in a style element</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style id="style"></style>
<body>
<script>
const happened = []
const style = document.getElementById("style");
test(() => {
  const r1 = new Text("body {}");
  const r2 = new Text("body {}");
  const script = document.createElement("script");
  script.textContent = `
    happened.push(style.sheet.cssRules.length);
  `;

  const df = document.createDocumentFragment();
  df.appendChild(r1);
  df.appendChild(script);
  df.appendChild(r2);

  assert_array_equals(happened, []);
  style.appendChild(df);
  assert_array_equals(happened, [2]);
}, "All style rules appended to a <style> element are inserted and " +
   "script-observable to scripts inserted in the `<style>` element, by the " +
   "time scripts execute after DOM insertions.");
</script>
